On a good day, that works out to about 100/2, thanks to my provider vastly overselling their shitty overcongested network as "fiber to the home". (It's just cable.)
That's not the bottleneck. The bottleneck is the IP interconnect capacity between edge network and its peers. If you only have 4x100 Gbit/sec IP sink to Level3 in SEA and your other sink is 100G to NTT, no amount of traffic engineering in your edge network is going to give you more than 500 Gbit/sec of exit and that exit will only be available if NTT has entire 100Gbit/sec that is not congested and Level3 has 400Gbit/sec not congested.
In eyeball networks the bottleneck is not upload. It is traffic being brought into the edge network from upstreams (netflix/photos/etc)
This is a accurate explanation. Eyeballs are inbound heavy and have plenty of outbound capacity (it's also why they don't care about outbound ddos so much...). However it's important to remember that they can easily congest their internal network infra on the inbound.
That's the standard ratio for Spectrum consumer internet. The ratio actually gets worse as you increase the upload speed. They cap out at 35 Mbps upload even with 940 Mbps download.
Most FTTH connections in Italy are 1000/100 or 1000/300 Mbit/s. I guess most people wouldn't even notice the difference in upload between 100 and 1000 Mbit/s.
You can configure cable to use more of its channels for upstream. They just don't because that would hurt downstream and force them to run more cables to make up the difference.
There's absolutely no reason you can't have symmetric cable if cable companies wanted to pay for the infrastructure.
It's not a matter of "running more cables", and not just a matter of cost. They have to complete their IPTV migration, which is a massive project, and has been in progress for years now. They also have to upgrade hardware at every single node, which is a multi-year project. With that also comes brand new noise mitigation problems.
Yes, you can configure it to use more channels for upstream, but only if you cut off television to all of those paying customers, likely losing a lot of subscribers, breaking carrier agreement contracts, lose the advertising dollars, and go out of business before you even get there. You also have to swap out all of their cable boxes, and leave whoever purchased their own box hanging.
As far as I know, no ISP in North America is currently using any DOCSIS 3.1 features for upload, and they're barely taking advantage of the features for download. Moving to OFDMA is the big barrier to opening upload speeds. The protocol supports it on paper, but turning paper into massive co-existing television and ISP infrastructure is not trivial.
